Ulysses has a clean, unobtrusive, easy to overview interface that allows focusing on writing. By default it's split up in 3 panes with sidebar, sheet pane and content pane from left to right. Unnecessary panes can be hidden.

Ulysses saves everything in the app so there's no file management outside of the editor involved. It organizes content in groups (folders) and sheets (files), has a powerful, easy to use search and allows adding keywords to attachments to help them be organized and found quickly. Groups can ha...

Marked can show formatted text in real time. It can be customized with built-in styles, using your own CSS templates or as a multi-column view. You can easily switch between different style with keyboard shortcuts.